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corestar's avatar
corestar
Icon for Contributor rankContributor
5 years ago
Solved

Arria 10 Native Floating Point Adder Issue

I'm using Quartus 19.1 Standard and there is an odd issue with the native Arria 10 floating point adder. As shown in the attached, the Ax input has a latency of 3 clocks but the Ay of only two. So th...
  • SengKok_L_Intel's avatar
    SengKok_L_Intel
    5 years ago

    Hi,


    You can actually click on that register from the Native DSP Block floating Point GUI to change the clock source and also disable that register if this is not required.



    Regards -SK


SengKok_L_Intel's avatar
SengKok_L_Intel
Icon for Regular Contributor rankRegular Contributor
5 years ago

Hi,


You can actually click on that register from the Native DSP Block floating Point GUI to change the clock source and also disable that register if this is not required.



Regards -SK


corestar's avatar
corestar
Icon for Contributor rankContributor
5 years ago

@SengKok_L_Intel ,

That worked! Thanks so much for the help. And I can reduce the multiplier latency, at the expense of Fmax, in the same way.

I'd suggest that removing that register might be a sensible default for an adder.